package c5.Example3;

public class Example3{
    public static void main (String[] args){
        String str = "abcd";
        System.out.println("将字符串转换为字符数组后的结果：");
        char[] charArray = str.toCharArray();
        for (int i = 0; i<charArray.length;i++){
            if (i!=charArray.length -1){
                System.out.println(charArray[i] + ",");
            } else {
                System.out.println(charArray[i]);
            }
        }
        System.out.println("将int的值转换String类型之后的结果："+String.valueOf(12));
        System.out.println("将字符串转换成大写字母之后的结果："+str.toUpperCase());
        System.out.println("将字符串转换成小写字母之后的结果："+str.toLowerCase());
    }
}
